diff --git a/socketIO_client/__init__.py b/socketIO_client/__init__.py
index 3bdecf1..2e56665 100644
--- a/socketIO_client/__init__.py
+++ b/socketIO_client/__init__.py
@@ -3,7 +3,10 @@ import json
 import requests
 import time
 from collections import namedtuple
-from urlparse import urlparse
+try:
+	from urlparse import urlparse
+except:
+	from urllib.parse import urlparse
 
 from .exceptions import ConnectionError, TimeoutError, PacketError
 from .transports import _get_response, _negotiate_transport, TRANSPORTS
@@ -254,13 +257,13 @@ class SocketIO(object):
         # Initialize heartbeat_pacemaker
         self.heartbeat_pacemaker = self._make_heartbeat_pacemaker(
             heartbeat_interval=socketIO_session.heartbeat_timeout / 2)
-        self.heartbeat_pacemaker.next()
+        next(self.heartbeat_pacemaker)
         # Negotiate transport
         transport = _negotiate_transport(
             self.client_supported_transports, socketIO_session,
             self.is_secure, self.base_url, **self.kw)
         # Update namespaces
-        for path, namespace in self._namespace_by_path.iteritems():
+        for path, namespace in self._namespace_by_path.items():
             namespace._transport = transport
             transport.connect(path)
         return transport
diff --git a/socketIO_client/transports.py b/socketIO_client/transports.py
index ed4e59c..e43e644 100644
--- a/socketIO_client/transports.py
+++ b/socketIO_client/transports.py
@@ -6,7 +6,10 @@ import six
 import socket
 import time
 import websocket
-from itertools import izip
+try:
+	from itertools import izip
+except:
+	izip = zip
 
 from .exceptions import SocketIOError, ConnectionError, TimeoutError